1847133782649 has 27 divisors (see below), whose sum is σ = 2789270943823. Its totient is φ = 1177822612032.

The previous prime is 1847133782609. The next prime is 1847133782677. The reversal of 1847133782649 is 9462873317481.

The square root of 1847133782649 is 1359093.

It is a perfect power (a square), and thus also a powerful number.

1847133782649 is a `hidden beast` number, since 1 + 8 + 471 + 33 + 78 + 2 + 64 + 9 = 666.

It can be written as a sum of positive squares in only one way, i.e., 247839687225 + 1599294095424 = 497835^2 + 1264632^2 .

It is not a de Polignac number, because 1847133782649 - 2¹⁹ = 1847133258361 is a prime.

It is a super-2 number, since 2×1847133782649² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1847133782609) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 93767569 + ... + 93787265.

Almost surely, 2^{1847133782649} is an apocalyptic number.

1847133782649 is the 1359093-rd square number.

1847133782649 is the 679547-th centered octagonal number.

It is an amenable number.

1847133782649 is a deficient number, since it is larger than the sum of its proper divisors (942137161174).

1847133782649 is an frugal number, since it uses more digits than its factorization.

1847133782649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39446 (or 19723 counting only the distinct ones).

The product of its digits is 48771072, while the sum is 63.

The spelling of 1847133782649 in words is "one trillion, eight hundred forty-seven billion, one hundred thirty-three million, seven hundred eighty-two thousand, six hundred forty-nine".